It’s not tough to see why Zemeckis or Gordon-Levitt might be interested in Pettit: a showman and endless innovator whose notorious 1974 stroll between the recently completed World Trade Centre towers was but the tip of the iceberg when it came to his exploits.

Of course, it’s not the only project the Flight director has sitting in his waiting room. He’s attached to several projects including Charlie Kaufman’s adaptation of Patrick Ness’ Chaos Walking, toy rabbit tale The Miraculous Journey Of Edward Tulane, documentary-spawned title Marwencol, and various others, including, teasingly, the long-talked about Roger Rabbit sequel. Reaching out to Gordon-Levitt appears to indicate that Clouds could be moving into prime position. As for JGL, he’ll next be seen in Sin City: A Dame To Kill For and is producing a film based on Neil Gaiman’s Sandman stories.